Very nice question! In this case we need to know how looks path of the cue ball after contact with second raił because then we can imagine whether object ball is placed somehere on this path but in my opinion you should use parallel shift system because it will give you much better result!
I have never been able to get this system to work for me. But I will try again. Thanks for the motivation.
thank you
what if object ball is not in the rail and we need use that plus 2 rail system? thank you
Very nice question! In this case we need to know how looks path of the cue ball after contact with second raił because then we can imagine whether object ball is placed somehere on this path but in my opinion you should use parallel shift system because it will give you much better result!